You should also have your attorney review your insurance plan to ensure it is adequate.

I researched the area and been there several times company I work for has a massive Data Center in the area..

I hope to switch over to their gateway box instead of remote readers soon so I can access data from the internet.

Which strategy would you do and how do I ensure my tax situation is maximized?

The tenants should be responsible for ensuring that their rent is paid on time.

There would be no additional penalty for early distribution.Work with your Solo 401(k) provider to ensure proper documentation of the event.

The fact is you can’t make a good decision with out all of the data and she can handle either option sell or 3rd party manage. 

If you are using a broker, they are trained to compare values from different data points to assist you in coming up with your price.

An IRA or 401(k) is best suited for passive income, which includes interest, dividends, royalties, rent from real property and the future sale of such a passively held asset.The other side of the equation is ensuring that as you conduct such a transaction, you are not personally benefiting in any way (such as a commission on the transaction) or adding value to the IRA/401(k) through the provision of goods or services. 

https://www.statesman.com/news/20190418/austin-region-fastest-growing-large-metro-in-nation-8-years-running-data-shows  Its job creation that is always the driver...